‘Three large drinking dens’ were found over the East weekend at Prestwick Bing in South Ayrshire.
The mess included popular energy drinks Mad Dog 2020 and Dragon Soop as well as broken glass and camping gear.
An out-of date passport was also found. The passport identified a man named Cameron, who would have turned 20 last summer.
Volunteers from South Ayrshire Clean-Up went out on Sunday morning and filled up bin bags full of the rubbish.
Dad-of-two, Chris Johnson, 39, one of the volunteers who helped clean up the mess said: "I was part of a group clearing out three large drinking dens in the area on Sunday morning.
"When I got home I thought I left my spare rubbish sacks up there, so I went back up to see if I could find them.
"When I wandered up to one of the drinking dens I spotted the passport under a tree next to empty bottles of MD 2020."
A school leaver form was also found as well as metal tent poles, some of which are believed to date back to last summer.
Chris said it was naive of young people to think they would not be pulled up for their behaviour, and he plans to hand the passport into police.He said: "It will go to the police to be returned.
"Due to the number of people who use that site it would be very difficult to get an enforcement action.
"So we want to get the message out for those who do litter, that even if enforcement officers don't see it, then the public are.
"The area is known for being notoriously bad for litter and antisocial behavior for a couple of years now.
"It's a job where no one wants to take on."
A South Ayrshire Council spokesperson said: "We have received information from one of the volunteers and are now considering what action to take.
"Enforcement officers are on patrol in the area and can issue £80 fines to anyone caught littering."